Table of Contents - WOC 2012

PO-STR-12
Congenital Superior Oblique Palsy and Trochlear Nerve Absence: A
Clinical-Radiological Study
Hwang Jeong-Min (1, 2) , Yang Hee Kyung (1, 2) (1, 2)
, Kim Jae Hyoung
1. Ophthalmology, Seoul National University College of Medicine
2. Seoul National University Bundang Hospital
Objective: To evaluate patients with congenital superior oblique palsy (SOP) by
classifying them according to their magnetic resonance imaging (MRI) findings
and cross-comparing the clinical characteristics of each groups.
Methods: Medical records of 97 patients who demonstrated typical signs of
congenital SOP were reviewed. The presence or absence of the trochlear
nerve was visualized with thin-section high-resolution MRI of cranial nerves.
Results: Of the 97 patients with congenital SOP, 73% of patients were identified
with an ipsilateral absent trochlear nerve and SO hypoplasia (absent group),
while the remaining 27% had a normal SO and trochlear nerve (present group).
Patients with an absent trochlear nerve showed significantly more frequent
head tilt (P= 0.030) that was manifest at an earlier onset before 1 year of
age (P < 0.001). Patients with a normal trochlear nerve had a more prominent
overelevation in adduction (P= 0.021) and were more frequently associated
with dissociated vertical deviation (DVD) (P= 0.006).
Conclusions: Congenital SOP patients without a trochlear nerve have a
hypoplastic SO and more frequently manifest head tilt at an earlier age, while
patients with a normal trochlear nerve showed prominent overelevation in
adduction and frequent DVD.
PO-STR-13
Assessment of Binocular Alignment Using the 3-Dimensional
Strabismus Photo Analyzer
Hwang Jeong-Min (1, 2) , Yang Hee Kyung (1, 2) , Han Sang Beom (1, 2) , Jeong
Chang Bu (1, 2) (1, 2)
, Kim Kwang Gi
1. Ophthalmology, Seoul National University College of Medicine
2. Seoul National University Bundang Hospital
Purpose: To evaluate the efficacy of 3-dimensional Strabismus Photo Analyzer
on the basis of 3D eye model for estimating binocular alignment of strabismus
using photographs.
Methods: Two independent ophthalmologists examined the angle of deviation
using Krimsky test and prism and alternate cover testing(PCT) in 32 exotropia,
30 esotropia, and 38 orthotropic controls. Photographs were obtained using
an 8.2-megapixel digital camera, and the images were analyzed using Photo
Analyzer. The images were adjusted for age-dependent ophthalmic biometry
and angle kappa.
Results: Regarding interobserver test-retest reliability, the half-width of 95%
limit of agreement was 3.5° for Krimsky test, 3.1° for PCT, and 1.5° for Photo
Analyzer. The half-width of 95% limit of agreement for intertest test-retest
reliability between was 2.8° for Photo Analyzer versus Krimsky test, 5.5° for
Krimsky test versus PCT, and 5.8° for Photo Analyzer versus PCT. Results of
Krimsky test and Photo Analyzer showed a strong positive correlation(R=.990,
P